A6 ignition lock problem

[Chalkie28]

I have recently changed a tail light bulb on my mates 08 a6 tdi. Since then the remote central locking won't work? The steering lock doesn't sound like its locking? And you have to manually turn the heater, radio and headlights off is this something i have done wrong as I have changed bulbs in this car once before. Thank you for your time in looking at this post

 

[Chalkie28]

Also it does the same with the spare key

 

[elan2s]

This section of the forum is for the current C7 chassis, your mate's car is a C6 suggest you repost there